--- drivers/gpu/drm/i915/intel_display.c.orig	2013-07-18 10:34:55.426542782 +0400
+++ drivers/gpu/drm/i915/intel_display.c	2013-07-18 10:35:50.030540397 +0400
@@ -8895,8 +8895,9 @@
 };
 
 static struct intel_quirk intel_quirks[] = {
-	/* Dell XPS13 SandyBridge */
+	/* Dell XPS13 models */
 	{ 0x0116, 0x1028, 0x052e, quirk_no_pcm_pwm_enable },
+	{ 0x0166, 0x1028, 0x058b, quirk_no_pcm_pwm_enable },
 
 	/* HP Mini needs pipe A force quirk (LP: #322104) */
 	{ 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
--- drivers/gpu/drm/i915/intel_panel.c.orig	2013-07-18 10:36:06.066539697 +0400
+++ drivers/gpu/drm/i915/intel_panel.c	2013-07-18 10:37:12.186536809 +0400
@@ -305,7 +305,8 @@
 
 		I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE);
 
-		if (HAS_PCH_SPLIT(dev)) {
+		if (HAS_PCH_SPLIT(dev) &&
+		    !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) {
 			tmp = I915_READ(BLC_PWM_PCH_CTL1);
 			tmp &= ~BLM_PCH_PWM_ENABLE;
 			I915_WRITE(BLC_PWM_PCH_CTL1, tmp);